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If Rs= 3Ω, Rf= 6Ω then the relation between vo and vg in case of a Non-Inverting amplifying circuit.

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If Rs= 3Ω, Rf= 6Ω then the relation between vo and vg in case of a Non-Inverting amplifying circuit.

(a) vo= 9vg

(b) vo= 6vg

(c) vo= 3vg

(d) vo= vg

This question was addressed to me in a job interview.

Question is taken from The Inverting and Non-Inverting Amplifier Circuit in division The Operational Amplifier of Electric Circuits

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The correct choice is (c) vo= 3vg

To explain I would say: vo= ((Rs+Rf)/Rs) *vg.

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